Nicholas jenkins



(No Model.)

N. JENKINS.

BALANCINC ATTACHMENT ECE' AUTOMATIC LAMP SUSPENDTNC DEVICES.

Patented DCC. 6, 1887.l

UNITED STATES PATENT OFFICEo NICHOLAS JENKINS, OF VVATERBURY, CONNECTICUT, ASSIGNOR TO HOLMES, BOOTH t HAYDENS, OF NEWY YORK, N. Y.

BALANCING ATTACHMENT FOR AUTOMATIC LANl'P-SUSPENDING DEVICES.

Application filed June 3, 1886.

To azZ whom it may concern:

Be it known that I, NIcIIoLAs JENKINs, a citizen of the United States, residing at Vaterbury, in the county ofNew Haven and State of Connecticut, have invented new and useful Improvements in Balancing Attachments for Automatic Lamp Suspending Devices, of which the following is a specication.

This invention relates to balancing attachments for those devices which are employed to raise and lower lamps in which the balancing attachment comprises two plates, arranged one above the other and the two pivoted together intermediate their ends.

The object of my invention is to provide a novel construction pivotally connecting` the plates, whereby they are held against rotating movements with respect to each other, while the upper plate can tilt out of a horizontal plane without tilting the lower plate.

The object of Iny invention I accomplish in the manner and by the construction of parts hereinafterdescribed,and specifically set forth in the claims, reference being made to the accompanying drawings, in which- Figure l is a side elevation of my improved balancing attachment with the smoke-bell and automatic lamp-suspension devices connected thereto. Fig. 2 is a sectional detail view through the pivotal connection of the balancing attachment, and Fig. 3a detail view showing the interior of the chambered case.

Referring to the drawings, the numeral l designates a su pporting-oase for inclosing the automatic operating mechanism of the lampsuspension devices. This casingl is attached to the ceiling or other support in any suitable manner, and the automatic mechanism inclosed in said casing may be of any approved construction, and need not be illustrated, as it forms no part of my present invention,

In the lower part ot' the casing l are openings 2, throngh which pass the suspensionchains 3, the upper ends of which are connected in any suitable manner with the automatic mechanism inclosed in said casing.

The balancing attachment consists of an upper plate, 4, and a lower plate, 5, said bars being of ornamental construction, preferably composed oi' metal,and arranged horizontally one above the other in the same vertical plane,

SPECIFICATION tornnine:y part of Letters Patent No. 374,478, dated December 6, 1887.

serial No. 204,048. (No model.)

with a pivotal connection centrally between their ends. The upper balance-plate, 4, is provided at or near each end with an eye, 6, for attachment to the lower ends of the upper chains, 3, and the lower balance-plate, 5, is provided at or near each end with an eye, 7, for attachment of the lower chains, 8, that extend to the lamp or lamp-frame. The lower edge of the upper balance-bar, 4, is formed centrally between its ends with a depending chambered case, 9, containing a laterally-projecting stud or pivot-pin, 1t), which engages with a curved loop, l2, formed on the upper central portion of the lower balance-plate, 5, said plates being thus provided with a central pivotal connection that facilitates the balancing and leveling of the suspended lamp. The chambered case 9 is closed by a disk, 11, having a central orifice and placed upon the case, the pivot-pin passing through the central orifice in the disk 1l and riveted down, as at l5, thereby holding said disk `in place and confining the curved loop 12 011 the pivotpin 10 within the chambered case. The .case 9 is provided with side apertures, 1G, Fig. 3, for the passage of the curved loop. This construction provides for awalkingbeam motion without permitting one plate to rotate or turn out of a vertical plane with the other plate,as if the lower plate has a tendency to turn or rotate, the wall of the case and the disk prevent such movement. The bottom edge of the lower balance-bar, 5, may be provided with an eye orloop, l3,for suspending asmokebell, `let, above the lamp.

This balancing attachment, composed of the centrally-pivoted balance-bars 4t and 5, arranged one above the other and connected with the lamp-suspension chains, as shown, can be used to practical advantage with any automatic lamp-suspension devices in which the lamp is wholly or partly suspended by means of chains, and by its use the vertical adjustment, leveling, and balancing of the lamp will be facilitated, besides assisting the proper working of the automatic operative mechan- Ism.

Ido not broadly claim a self`balancing lampsupport for spring suspension devices, consisting of two bars or plates having their adjacent edges pivotally connected together at the een- ICO ter of their length, whereby the upper bar or plate may assume an inclined position Without changing the horizontal position of the lower bar or plate.

Having thus described my invention, wha I claim is- 1. A self-balancing lamp-support for spring vsuspension devices, consisting of the upper plate having` its lower portion provided eentrally between its ends with a chanibered ease, 9, containing a laterally-projecting pivot-pin, l0, a disk, l1, secured to one side of said easing, and the lower plate having` centrally between its ends the curved loop 12, passing through the case over the pivot-pin, substantially as described.

2. A self-balancing lamp-support for spring suspension devices, consisting` of the upper plate formed integral at its lower edge with the ehambered ease 9 and pivot-pin 10, the disk 11, arranged at one side of the case and secured to the pivot-pin, and the lower plate formed integral with the curved loop 12,Whieh extends through the ease over the pivot-pin, and is confined by the Wall of the case and the disk, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

NICHOLAS JENKINS.

Witnesses:

GEO. H. BENI-IAM, THOMAS I. WALKER. 

